Continuity mistake: Near the end when Iris and Joe are talking, Iris sits with her elbow on the couch and her head against her hand. In the next shot, her forearm is resting on the couch, and her hand is hanging down, away from her head.
Continuity mistake: The explanation that Cisco draws about the endless cycle changes in between shots, not counting the added words "past", present", and "future" (which he could have written when off camera, not that it would make sense to do so since he already explained what was past, present, and future). Where the loop crosses itself is higher up as well as the "FF + TR" being different.
Revealing mistake: When Iris is sitting in bed recording the message for Barry, she is holding her iPhone so that the start button is on the left side, but the "video record" button appears on the right. Additionally, her right hand covers the speaker area of the phone fully, including the front facing camera. It is impossible for Iris to be recording the video live and reveals that the video footage was recorded ahead of time. The illusion that the video is being recorded by Iris live is further ruined by the fact that the room lighting is turned off in the scene, but the recording is well lit. (00:02:55)
Continuity mistake: When Iris covers herself with the blanket, the blanket is off her left shoulder, and you see her dress strap. Later the blanket is fully covering her shoulder. The blanket changes a few more times in later shots.
Continuity mistake: When Cisco opens up a portal, Caitlin and Dominic are next to it and seen moving towards it, with Ralph standing in front of the group (as if he's covering them). In the next shot, Caitlin and Dominic are going through the portal followed by Cisco, but Ralph is nowhere to be seen as he's already entered the portal. There should be no way for him to completely enter the portal first.
Continuity mistake: When Joe and Iris are going to talk to Matthew Kim, Iris is already wearing the suit that Cisco later makes for her, she just wears it open the first time and closed the second time. (00:13:41 - 00:29:50)
Suggested correction: She is wearing the jacket when speaking with Matthew Kim because it is her jacket. When Cisco has her new outfit in the suit bag, he said something to the effect of "I had to make do," meaning that it was short notice and he could not make her a suit like he did for other speedsters. She is essentially wearing regular clothes with a mask, and her jacket was part of that outfit. Quite frankly, all the clothes could have been hers, but we know the jacket is.
Not only that, but in the scene before, we see the jacket hanging over her chair. So just something she wore that day.
News Flash - S5-E4
Continuity mistake: When Iris and Barry are on the baseball field beside the bench the sun changes between shots.
The Last Temptation of Barry Allen, Pt. 2 - S6-E8
Continuity mistake: When Barry was infected by Rosso his infected fingers and nails tore through the fingertips of his gloves. When he is healed from the infection the fingertips in his gloves are no longer torn. (00:30:18)
The Last Temptation of Barry Allen, Pt. 2 - S6-E8
Deliberate mistake: There's an awkward moment during Cecile and Kamilla's escape from Bloodwork's minions where Cecile doesn't close the door for several seconds so the cameraman can walk through as they follow them.
All's Wells That Ends Wells - S7-E1
Continuity mistake: Iris is backing up away from her evil counterpart while holding her hands up in front of her. She has fake white nails on, but in the next shot with evil Iris in front view, it shows her hands and there are no fake nails and no nail polish. These are the hands of a stunt double backing up. (00:21:28)
Continuity mistake: When Iris is showing Frost's mother the obituary, in a shot facing the mother she's holding the folder open, then after she says "it feels cold", the shot changes to behind her and the folder is instantly shut.
The Man in the Yellow Tie - S8-E18
Continuity mistake: At the start when Flash is struck by the accidental lightning, he rolls on the ground and gets mud on his back. When he stands up, and we see his back in a reverse shot, there's no mud.
